Fire-box construction.



J. M. MOCLELLON.

FIRE BOX CONSTRUCTION.

APPLICATION FILED APILzs, 1912.

1,124,49. Patented 12111.12, 1915.

THE MORRIS PETERS CO PHOTO LJTHO v WASH/NG rGN D C JAMES M. MCCLELLON, OF EVERETT, MASSACHUSETTS.

iEIBlE-BOX CONSTRUCTION.

Specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed April 26, 1912. Serial ANo. 693,318.

To all whom it may concern:

Be it known that l, JAMES M. MCCLELLON, a citizen of the United States, and a resident of Everett, county of Middlesex, and State of Massachusetts, '(whose post-oice address is 159 Beacham street, Everett, Massachusetts have invented an Improvement in Fire-Box Construction, of which thefoll owing description, in connection with the accompanying drawings, is a specification, like characters on the dra-wings representing like parts.

This invention relates to fire-boxes for locomotive and other boilers.

The character of the invention may be best understood by reference to the following description of an illustrative embodiment thereof shown in the accompanying drawing, wherein:

Figure l is a vertical section through a portion of a re-box and boiler embodying the invention; Fig. 2 is a horizontal section taken on line 2-2 of Figl; and F ig. 3 is a vertical section taken on line 3 3 of Fig. 1.

Referring to the drawing, 1 designates the usual barrel of a fire-box containing fiues 3 extending longitudinally thereof and having ends expanded in apertures in the front wall comprising a flue-sheet side 5 having a portion extending down somewhat beneath the barrel of the boiler and oppositely to a throat sheet side 7 extending from said barrel to the bottom of said iue sheet, said sheets being spaced kto receive water from the barrel. Interposed between said sheets at their lower ends is a closure member or section 9 secured to them by through rivets or other suitable means. The sheets may be bent around and embrace the ends of said section into abutting engagement and may be welded or otherwise secured together.

The fire-box is provided with hollow side walls 1l (partially shown) suitably secured to said flue-sheet. The lower ends of these walls also may be closed by sections 13 introduced into said ends and suitably secured to the side portions of said walls.

To provide a strong foundation for the fire-box and effective to connect, and maintain the front, rear and side walls of the fire-box in proper relation, there is provided a foundation ring 15 (partly shown herein) preferably in the form of one solid box. An important feature of the invention relates to means for connecting this foundation ring to the wall closure sections. To this end the sections have tongues 17 projecting therefrom and formed to fit into correspondingly shaped grooves 19 in the foundation-ring. Preferably these tongue and groove connections do not extend the entire lengths of the parts, but terminate sufficient distances from their ends (F ig. 2) to provide ample material as at 21 for limiting relative longitudinal movement of the ring and sections. By this tongue and groove or rabbeted connection of the foundation ring with a section they are effectively prevented from relative lateral and longitudinal displacement and are maintained in proper superposed relation on assembly, and without the necessity of additional securing means. Obviously the greatest strain which would be brought upon the foundation ring and section is that tending toward lateral displacement. The weight of the fire-box on the foundation ring will tend to hold one on the other, but additional means may be provided for this purpose, as for instance, stud screws 23 threaded into said sections and projecting down through said foundation ring to receive suitable nuts, although it will be obvious that the sections and foundation ring might be secured against vertical displacement by any appropriate securing means.

It will be apparent that various modifications of the construction shown may be made without departing from the spirit and scope of the invention.

Having described one embodiment of the invention without limiting the same thereto, what I claim as new and desire to secure by Letters Patent is:

1. In a re-box, the combination of a foundation ring and wall closure means formed for interlocking engagement, and a wall having side portions secured to said wall closure means.

2. In a fire-box, the combination of foundation and wall closure means formed for interlocking engagement, and a wall having portions secured to said wall closure means.

3. In a fire-box, the combination of foundation and wall closure means rabbeted together, and wall portions secured to said Wall closure means.

4. In a fire-box, the combination of foundation and Wall closure means having tongue and groove connections, and Wall portions secured to said Wall closure means. 5. In a lire box, the combination of foundation and Wall closure means cach hav- Copies of this patent may be obtained for formed for interlocking engagement, andl means to secure them together.

8. In a fire-box, the combination of solid Wall closure sections, and a foundation ring, said sections and ring being formed for interlocking engagement.

9.In a fire-box, the combination of foundation and Wall closure means inter- Vlocking with one another.

l0. In a fire-box, the combination of a foundation ring anda Wall closure section having a tongue and groove connection.

In testimony whereof, I havey signed my name to this specification, in the presence of two subscribing Witnesses.

JAMES MCCLELLON.

f 7Witnesses z HENRY T. WILLIAMS, EVERETT S. EMERY.

ve cents each, by addressing the Commissioner of Talents,

Washington, D. C. l 

